Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Future Amortization Of Finite-Lived Intangibles) (Details) (USD $) In Millions	6 Months Ended
Sep. 30, 2011
Goodwill And Acquisition-Related Intangibles, Net [Abstract]
2012 (remaining six months)	$ 44
2013	78
2014	68
2015	63
2016	51
Thereafter	112
Total	$ 416

The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fourth succeeding fiscal year.

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- Definition

The amount of amortization expense expected to be recognized during year four of the four succeeding fiscal years.

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year one of the four succeeding fiscal years.

+ Details

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Balance Type:	debit
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- Definition

The amount of amortization expense expected to be recognized during year three of the four succeeding fiscal years.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The amount of amortization expense expected to be recognized during year two of the four succeeding fiscal years.

+ Details

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- Details

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- Definition

The aggregate estimated amortization expense for succeeding fiscal years for intangible assets subject to amortization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The amount of amortization expense expected to be recognized during the remainder of the current fiscal year.

+ Details

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